class Exercise_fill():
    def __init__(self,id,content,object,measure,fig,answer):
        self.id = id #
        self.content = content#题干
        self.object = object#对象
        self.measure = measure#计量单位
        self.fig = fig#图片
        self.answer = answer#答案

    def tostring(self):
        return "id:{},题干:{},对象:{},计量单位:{},图片:{},答案:{}".format(self.id,self.content,self.content,self.measure,self.fig,self.answer)

